Mortising-machine.



n. c. NIEMI. MORTISI NG MACHINE. APPLICATION TILED 00121., 1913.

Patented July 7, 191% ww Mrmme un rnn s'rarns PATENT onnron.

DAVID GONST'ANTINE NIEMI, OF GLASSPORT, PENNSYLVANIA.

MORTISING-IVIACI-IINE.

To all whom it may concern Be it known that I, DAVID CONSTANTINE NIEMI, a citizen of Finland, and a resident of Glassport, in the county of Allegheny and the State of Pennsylvania, have invented a new and Improved lVIort-ising-Machine, of which the following is a full, clear, and exact description. Y

This invention relates to a mortisingmachine of that type whereby triangular, square, rectangular, hexagonal, elliptical, or any irregularly shaped holes can be conveniently cut at a single operation.

The invention has for one of its objects to improve and simplify construction of apparatus of this character, so asto be re liable and convenient in use and composed of comparatively few parts, so designed as to occupy smallest possible space.

Another object of the invention is the provision of novel operating means for auger and chisels to conveniently cut a finished hole in wood or any material for which the machine is adapted.

These and other objects in view,- the vention comprises various novel features of construction and arrangement of parts which will be more fully described hereafter and set forth in the claim appended. hereto.

In accompanying drawings, which illustrate one embodiment of invention, and wherein similar reference characters are employed to designate corresponding parts, Figure 1 is a side view of the device arbitrarily chosen the one designed to cut a square hole; The view shows section through chisels and chisel feeder mechanism. Fig. 2 is a plan of the device. Fig. 3 is an upper sectional view on the line 3-3 Fig. 1. Fig. 1 is a lower sectional view on the line 4.4 Fig. 1. Fig. 5 is a development of chiselram as it appears in the machine belng described.

While I have shown the invention in its embodiment as a machine for drilling square holes, I desire it to be understood that the features of this invention can be applied to mortising machines adapted for cutting any regularly or irregularly shaped holes.

Referring to the drawings, the numeral 6 designates a frame which supports bearing-block 12 movable up and down in the ways 11. Between the ways 11 and parallel to them is mounted a rack 14, which meshes with the worm gear 13 on the spindle 16.

Specification of Letters Patent.

Application filed Detober 21, 1.913.

Patented July *7, 1914. serial No. 796,414.

The lower end of the frame is adapted to form a base for the machine and a suitable table 29 for supporting the stock or material to be operated upon. In addition to the above the frame 6 carries a bracket 37 at a convenient distance from the table 29 to suit the material to be operated upon. The I bracket 7 is adapted to receive the. chiselguide 10, functions of which will be more fully described later. The bearing-block12 is adapted to slide up and down in the ways 11 on frame 6, and supports spindle 16 in the bearings 15 and 15, and the crank shaft 18 in the bearing 15". p i

The crank shaft 18 carries the bevel gear 19 at one end and the crank 30 on the other end. The bevel gear meshes with the pinion 17 onthe spindle. If it is desired to operate the machineby machine power, apulley or equlvalent transmisslon means may be substituted for the crank.

16 which carries the pinion 17. The pinion 1.7 "meshes with the bevel gear 19, thus transmitting the motion from the crank shaft to the spindle. 'The spindle also supports the worm wheel'13 which meshes with the rack 1 1 on the frame. As the pinion 17 and the worm wheel 13 are rigidlymounted on the spindle, and their hubs bear against the ends of the bearings 15 and 15 respectively, the spindle 16 is held in a definite relation to the bearing-block 12. it is clear that when the spindle is rotated it is carried up or down in relation to the frame, and as it carries the auger and the chisels at its lower end, it provides the feeding mechanism. in the machine. 1

As shown in Fig. 1 the spindle l6 sup ports the auger 21 inserted in hole 20 and secured therein by the set screw 22. The

auger 21 operates through the hollow chiselram 9, which is composed of four .chisels. To hold the chisels in proper relation to each other and to the rest of the machine the guides 10 and 26 are provided. The lower end of the ram has a uniform section and a sliding fit in the guide 10, while the upper end is enlarged to give suflicient room for the enlargement of spindle. The section of the chisel-ram which runs through the guide 10 is square as shown at 28 Fig. 4c, while the upper end of it forms a cylinder as shown in Fig. 3. The cylindrical guide 26 (see Figs. 1 and 3) rests on the upper shoulder of the enlargement 23 on roll, As'fit travels-around with the spindle, itgives success ve pressures to the .chisels inv 'from the ram.

. consists o'f'a roller 24%.frevolving on the pin 25 mounted on the enlargement 23 as shown the spindle 1 6 and prevents the chisels from I Aerated upon respectively. The holes 27 are provided in the chisels to eliminate chips The operating mechanism for the chisels in Fig. 1. The'upper ends of chisel are out obliqueto form-an incline for the roller. The successive chlsels and lnclines are shown in Fig. 5; When the machine is op:

i eratedthe spindle is carried down as'heretofore described and as the chisels rest on the material "to beoperated upon, the roller 24"has a continuous incline upon which to the ram, a

When the device is used the operator turns the forankj30, consequently the spindle 16 turns. The worm wheel 13 performs the action of feeding the auger 21, and the roller Copies of this patent may be obtained for ,five cents each, y addressing the (lomni'issionerofPatents,

'24 feeds the chisels in conjunction with the auger; The chisels out the sides of the hole while the auger removes "the chips and cuts open the central portion of the hole.

From the foregoing description taken in connection with the accompanying drawings the advantages of the method of operation and .ofthe apparatus shown will be'readily understood by those skilled in the art to which :the'invention appertains; and-'while I havedescribed the apparatus which I now considerfito be the best embodiment thereof, I desire to have it understood that the apparatus shown'is merely illustrative and such changes as are within the scope of the appended claim may be made when desired. V

Having thus described my invention I claim as .new and desire to Securehy Letters Patent:

A ,mortising machine comprising a re volvingspindle *carrying an auger, means for revolving the spindle and feeding it longitudinally, 'a series of chisels forming a hollow cutter surrounding the auger and having each an inclined upper end, and a roller mounted in the revolving spindle-and acting'in SIIQCGSSIOH'OII the ser es of ChlSQlS.

In testimonywhereof I have signed my: name to this specification "in the presence of two'wi tnesses. I i 7 DAVID CONSTANTIN E Witnesses: r i 1 Trrnorrrrnus rHOK KANEN,

GEORGE SJoBLoM. a

Washington,"D.'G.' I 

